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Full text of "The Morphology And Evolution Of The Apes And Man"

CIRCULATION,  BLOOD AND
The anttrlfji* ?\(r?;V Carpal i'l'tfry supplies the- interior radio-ulnar, radio-carpal, carp>ii:et:iea:'pr:l road :::tvr-carpal joints. The .$^/t"T77Y.w/* ;: ,:# ,-uypiies the ihenaj muscles, the inner side of the poll ex. and give* .; twL to complete the superficial palmar arc*:. It :- sure." :h;it the Gorilla has no superficial palmar aivh ie-er^t. ::s hand has not vet been freeJ from the dutv of sucix rtin*
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the body in locomotion. In the Orang the pali^av .rches are similar to those in Man,
The ITlnar Artery (fig. 43 1 gives oS a -Je-jp 3 -ranch which unites with the radial arterv to ion:: the deep palmar arch. The parent stem runs Jiovr. into the hand, where it plays an important par: in supplying the digits. In the Chimpanzee it bifurcates ; one branch supplies the inner side of the minimus, and the second divides into two vessels which supply the adjacent sides of the minimus and acnularis. and annularis and inedius. The other parts of the Sngers are supplied by the radial artery. Hence tie radial and ulnar arteries have equal distributions as regard? ihe skin of the pollex and fingers.
It must be remembered that the arteries c-f the limbs are liable to considerable variation as »hown by Eisler (442), Manners Smith l!49a), and others. Variations were observed bv me in three consecutive
b
Chimpanzees. The most notable differences were observed in the size of the superficial palmar arch, but it was present in all three animals. This seems to distinguish the Chimpanzee from the Gorilla, which has no superficial arch. The Orang has a large superficial arch.